喀纳斯湖硅藻的中国新记录种及现生种属调查

摘要

为了解喀纳斯湖硅藻群落分布生态状况及多样性, 对喀纳斯湖表层沉积物及水体中的硅藻进行了调查.共鉴定硅藻46属123种[1].其中13种为中国新记录种,分别为:模糊双眉藻Amphora indistincta Levkov,忽视双眉藻密纹变型A.neglecta f.densestriata Foged,埃德伦星杆藻Asterionella edlundii Stoermer&Pappas,星纹星盘藻Discostella stelligeroides(Hustedt)Houk&Klee,钝脆杆藻贝加尔近披针形变型Fragilaria capucina fo. sublanceolata-baikali Flower&Williams,马卡洛娃异极藻Gomphonema makarovae Lange-Bertalot,吉奥蹄形藻Hippodonta geocollegarum Lange-Bertalot,Metzeltin&Witkowski,拟长喙蹄形藻H.pseudorostrata Metzeltin Kulikovskiy & Lange-Bertalot,麦特廷菱形藻Nitzschia metzeltinii Lange-Bertalot,机遇盘状藻Placoneis opportuna(Hustedt)Chudaev&Gololobova,拟杆状鞍型藻Sellaphora pseudobacillum(Grunow)Lange-Bertalot&Metzeltin,马迪达鞍形藻S.madida(Kociolek)Wetzel,斯维律十字形藻Staurosira aff.sviridae Chudaev&Gololobova. 文章对此13种中国新记录种硅藻进行了详细的形态特征描述.%To assess the diatom diversity of Lake Kanas, the largest freshwater lake in the Altay region, we analyzed a total of 36 diatom samples: 19 samples from the surface sediment in the lake, and 17 samples were the water of the lake, rivers and wetlands. In all, 123 taxa belonging to 46 genera were observed. Some of the 123 taxa listed are illus-trated with LM and SEM photos.Among them,13 are newly recorded species in China.They are Amphora indistincta Levkov,A.neglecta f.densestriata Foged,Asterionella edlundii Stoermer&Pappas,Discostella stelligeroides(Hus-tedt)Houk&Klee,Fragilaria capucina fo.sublanceolata-baikali Flower&Williams,Gomphonema makarovae Lange-Bertalot,Hippodonta geocollegarum Lange-Bertalot,Metzeltin&Witkowski,H.pseudorostrata Metzeltin Ku-likovskiy&Lange-Bertalot,Nitzschia metzeltinii Lange-Bertalot,Placoneis opportuna(Hustedt)Chudaev&Golo-lobova,Sellaphora pseudobacillum(Grunow)Lange-Bertalot&Metzeltin,S.madida(Kociolek)Wetzel and Staurosira aff.sviridae Chudaev&Gololobova.